Cumming R, Kelsey J, Nevitt M. Methodologic issues in the study of frequent and recurrent health problems: Falls in the elderly. Ann Epidemiol 1990;1: 49-56.
Cummings S, Nevitt M, Kidd S. Forgetting falls the limited accuracy of recall of falls in the elderly. J Am Geriatr Soc 1988; 36: 613.
Peel N. Validating recall of falls by older people. Accident Analysis Prev 2000; 32: 371_72.
Schmid NA. Reducing patient falls: a research-based comprehensive fall prevention program. Mil Med. 1990 May;155(5):202-7.
Oliver D, Development and evaluation of evidence based risk assessment tool (STRATIFY) to predict which elderly inpatients will fall: case-control and cohort studies. BMJ. 1997 Oct 25;315(7115):1049-53.